what is a gantry crane?
A gantry crane is an overhead crane built on a gantry.
Gantry cranes are the most widely used type of overhead crane. At the same time, according to different applications of gantry cranes, there are also many types.
It is very necessary to choose a suitable gantry crane according to your user environment. It can make your work easier.
Different types of gantry cranes are portable gantry cranes, single-girder gantry cranes, double-girder gantry cranes, semi-gantry cranes, rail-mounted gantry cranes, rubber-tyred gantry cranes, etc.
After reading this article, you will know how to choose the type of gantry crane that is right for you and make your job easier.
Portable Gantry Crane
Portable gantry cranes are also called mobile gantry cranes, including E series gantry cranes, a-frame cranes, adjustable gantry cranes, and aluminum gantry cranes.
Portable gantry cranes are usually small gantry cranes commonly found in garages and smaller manufacturing workshops, usually with a maximum lifting weight of 10 tons.
Portable gantry cranes usually feature heavy-duty casters so they can be moved easily. This allows him to adapt to a very wide variety of environments.
E series gantry crane
The E series gantry crane is the most common portable gantry crane. Its side bottom structure is two triangles, which is more stable than the A-type. And more economical, and designed for extended service life.
A-frame cranes
A-frame cranes are profiled like A and are usually more convenient for height adjustment. Portable, lightweight, and affordable lifting solution with a sturdy A-frame design.
adjustable gantry crane
The adjustable gantry crane can adjust the height of the gantry crane, which is convenient for entering an environment with limited height, and the available scenes are perfect.
Aluminum Gantry Crane
Aluminum gantry cranes are characterized by their own very light gravity, portable, and extremely stable under load. Easy to disassemble.
Comparison table of four portable gantry cranes
| E series | A-frame | adjustable | Aluminum | |
|---|---|---|---|---|
| dead weight | heavier | medium | medium | very light |
| lift weight | up to 10 tons | up to 10 tons | up to 8 tons | up to 5 tons |
single girder gantry crane
Single girder gantry cranes are usually used in outdoor freight yards (some indoor factories cannot support the installation of overhead cranes, and gantry cranes can also be used instead), and the weight of material handling is usually less than 15 tons.
The metal structure of the gantry crane is like a door-shaped frame. Two feet are installed under the main beam, which can walk directly on the track on the ground. The two ends of the main beam can have outrigger cantilevers.
The single main girder gantry crane has the advantages of simple structure, convenient manufacture and installation, and lightweight. The main beam is mostly an eccentric rail box frame structure.
Double girder gantry crane
The double-girder gantry crane has a large carrying capacity and is suitable for use in environments with large lifting needs, or for sites that are used very frequently.
Compared with the single-girder gantry crane, it has better stability and more options, but its own weight is larger and the cost will be higher than that of the single-girder gantry crane.
The structure of the double girder is divided into a box girder and a truss. At present, the box-type structure is generally used.
Box-type structure, steel plates are welded into a box-shaped structure, which has the characteristics of high safety and high rigidity. Generally used for the large tonnage and super tonnage gantry cranes.
Box girder has the disadvantages of high cost, heavy weight, and poor wind resistance.
The structural form of truss beam, angle steel, or I-beam welding has the advantages of low cost, lightweight, and good wind resistance.
However, due to a large number of welding points, the truss itself has defects, and the truss beam also has shortcomings such as large deflection, low stiffness, relatively low reliability, and frequent welding point detection. It is suitable for places with low safety requirements and small lifting weights.
Semi-gantry Crane
Semi-gantry crane, also known as a single-leg gantry crane, is a small and medium-sized gantry crane. One side of the crane girder is supported by a unilateral outrigger that can travel on the ground track, and the other side is supported on the bracket track.
It can be used outdoors, one side is the workshop support, and the other side is the bracket track. It can also be used indoors. Supplementary equipment for material handling under the overhead crane.
FAQs
A gantry is an overhead bridge-like structure supporting equipment such as a crane, signals, or cameras.
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